{"id":"https://openalex.org/W2024545955","doi":"https://doi.org/10.2481/dsj.iaga-20","title":"Principal Component Analysis of Geomagnetic Data for the Panzhihua Earthquake (Ms 6.1) in August 2008","display_name":"Principal Component Analysis of Geomagnetic Data for the Panzhihua Earthquake (Ms 6.1) in August 2008","publication_year":2011,"publication_date":"2011-01-01","ids":{"openalex":"https://openalex.org/W2024545955","doi":"https://doi.org/10.2481/dsj.iaga-20","mag":"2024545955"},"language":"en","primary_location":{"id":"doi:10.2481/dsj.iaga-20","is_oa":true,"landing_page_url":"https://doi.org/10.2481/dsj.iaga-20","pdf_url":"https://storage.googleapis.com/jnl-up-j-dsj-files/journals/1/articles/114/submission/proof/114-1-213-1-10-20150414.pdf","source":{"id":"https://openalex.org/S62969111","display_name":"Data Science Journal","issn_l":"1683-1470","issn":["1683-1470"],"is_oa":true,"is_in_doaj":true,"is_core":true,"host_organization":"https://openalex.org/P4310320511","host_organization_name":"Ubiquity Press","host_organization_lineage":["https://openalex.org/P4310320511"],"host_organization_lineage_names":["Ubiquity Press"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Data Science Journal","raw_type":"journal-article"},"type":"article","indexed_in":["crossref","doaj"],"open_access":{"is_oa":true,"oa_status":"gold","oa_url":"https://storage.googleapis.com/jnl-up-j-dsj-files/journals/1/articles/114/submission/proof/114-1-213-1-10-20150414.pdf","any_repository_has_fulltext":true},"authorships":[{"author_position":"first","author":{"id":"https://openalex.org/A5100369263","display_name":"Junhui Li","orcid":"https://orcid.org/0000-0002-0127-2484"},"institutions":[{"id":"https://openalex.org/I2799922383","display_name":"Geophysical Survey","ror":"https://ror.org/05sbpak56","country_code":"RU","type":"facility","lineage":["https://openalex.org/I1313323035","https://openalex.org/I2799922383","https://openalex.org/I4210163714"]},{"id":"https://openalex.org/I4210149611","display_name":"Seismological Bureau of Shanghai","ror":"https://ror.org/04g9b5w11","country_code":"CN","type":"government","lineage":["https://openalex.org/I4210149611"]}],"countries":["CN","RU"],"is_corresponding":false,"raw_author_name":"Junhui Li","raw_affiliation_strings":["National Geophysical Observatory at Mengcheng, Hefei 230031, China","Seismological Bureau of Anhui, Hefei 230031, China","Seismological Bureau of Anhui"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"National Geophysical Observatory at Mengcheng, Hefei 230031, China","institution_ids":["https://openalex.org/I2799922383"]},{"raw_affiliation_string":"Seismological Bureau of Anhui, Hefei 230031, China","institution_ids":[]},{"raw_affiliation_string":"Seismological Bureau of Anhui","institution_ids":["https://openalex.org/I4210149611"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5101494084","display_name":"Qi Li","orcid":"https://orcid.org/0000-0001-7901-4621"},"institutions":[{"id":"https://openalex.org/I4210126061","display_name":"Institute of Geology and Geophysics","ror":"https://ror.org/030vmwa78","country_code":"CN","type":"facility","lineage":["https://openalex.org/I19820366","https://openalex.org/I4210126061"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Qi Li","raw_affiliation_strings":["Institutes of Geophysics, CEA, Beijing 100086, China","Institutes of Geophysics, CEA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institutes of Geophysics, CEA, Beijing 100086, China","institution_ids":["https://openalex.org/I4210126061"]},{"raw_affiliation_string":"Institutes of Geophysics, CEA","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5034943601","display_name":"Dongmei Yang","orcid":"https://orcid.org/0000-0001-8226-2554"},"institutions":[{"id":"https://openalex.org/I4210126061","display_name":"Institute of Geology and Geophysics","ror":"https://ror.org/030vmwa78","country_code":"CN","type":"facility","lineage":["https://openalex.org/I19820366","https://openalex.org/I4210126061"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Dongmei Yang","raw_affiliation_strings":["Institutes of Geophysics, CEA, Beijing 100086, China","Institutes of Geophysics, CEA"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Institutes of Geophysics, CEA, Beijing 100086, China","institution_ids":["https://openalex.org/I4210126061"]},{"raw_affiliation_string":"Institutes of Geophysics, CEA","institution_ids":[]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5005256528","display_name":"Xingzhou Wang","orcid":null},"institutions":[{"id":"https://openalex.org/I4210149611","display_name":"Seismological Bureau of Shanghai","ror":"https://ror.org/04g9b5w11","country_code":"CN","type":"government","lineage":["https://openalex.org/I4210149611"]},{"id":"https://openalex.org/I4210152545","display_name":"Anhui Provincial Meteorological Bureau","ror":"https://ror.org/04zrrk968","country_code":"CN","type":"government","lineage":["https://openalex.org/I4210152545"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Xingzhou Wang","raw_affiliation_strings":["Seismological Bureau of Anhui, Hefei 230031, China.\r\nNational Geophysical Observatory at Mengcheng, Hefei 230031, China","Seismological Bureau of Anhui"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Seismological Bureau of Anhui, Hefei 230031, China.\r\nNational Geophysical Observatory at Mengcheng, Hefei 230031, China","institution_ids":["https://openalex.org/I4210152545"]},{"raw_affiliation_string":"Seismological Bureau of Anhui","institution_ids":["https://openalex.org/I4210149611"]}]},{"author_position":"middle","author":{"id":"https://openalex.org/A5053746885","display_name":"Hong Dequan","orcid":null},"institutions":[{"id":"https://openalex.org/I4210149611","display_name":"Seismological Bureau of Shanghai","ror":"https://ror.org/04g9b5w11","country_code":"CN","type":"government","lineage":["https://openalex.org/I4210149611"]},{"id":"https://openalex.org/I4210152545","display_name":"Anhui Provincial Meteorological Bureau","ror":"https://ror.org/04zrrk968","country_code":"CN","type":"government","lineage":["https://openalex.org/I4210152545"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Dequan Hong","raw_affiliation_strings":["Seismological Bureau of Anhui, Hefei 230031, China.\r\nNational Geophysical Observatory at Mengcheng, Hefei 230031, China","Seismological Bureau of Anhui"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Seismological Bureau of Anhui, Hefei 230031, China.\r\nNational Geophysical Observatory at Mengcheng, Hefei 230031, China","institution_ids":["https://openalex.org/I4210152545"]},{"raw_affiliation_string":"Seismological Bureau of Anhui","institution_ids":["https://openalex.org/I4210149611"]}]},{"author_position":"last","author":{"id":"https://openalex.org/A5036711291","display_name":"Kang He","orcid":null},"institutions":[{"id":"https://openalex.org/I4210149611","display_name":"Seismological Bureau of Shanghai","ror":"https://ror.org/04g9b5w11","country_code":"CN","type":"government","lineage":["https://openalex.org/I4210149611"]}],"countries":["CN"],"is_corresponding":false,"raw_author_name":"Kang He","raw_affiliation_strings":["Seismological Bureau of Anhui, Hefei 230031, China","Seismological Bureau of Anhui"],"raw_orcid":null,"affiliations":[{"raw_affiliation_string":"Seismological Bureau of Anhui, Hefei 230031, China","institution_ids":[]},{"raw_affiliation_string":"Seismological Bureau of Anhui","institution_ids":["https://openalex.org/I4210149611"]}]}],"institutions":[],"countries_distinct_count":2,"institutions_distinct_count":4,"corresponding_author_ids":[],"corresponding_institution_ids":[],"apc_list":{"value":350,"currency":"GBP","value_usd":429},"apc_paid":{"value":350,"currency":"GBP","value_usd":429},"fwci":0.2543,"has_fulltext":true,"cited_by_count":7,"citation_normalized_percentile":{"value":0.58971524,"is_in_top_1_percent":false,"is_in_top_10_percent":false},"cited_by_percentile_year":{"min":90,"max":97},"biblio":{"volume":"10","issue":null,"first_page":"IAGA130","last_page":"IAGA138"},"is_retracted":false,"is_paratext":false,"is_xpac":false,"primary_topic":{"id":"https://openalex.org/T12424","display_name":"Earthquake Detection and Analysis","score":1.0,"subfield":{"id":"https://openalex.org/subfields/1908","display_name":"Geophysics"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},"topics":[{"id":"https://openalex.org/T12424","display_name":"Earthquake Detection and Analysis","score":1.0,"subfield":{"id":"https://openalex.org/subfields/1908","display_name":"Geophysics"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10110","display_name":"earthquake and tectonic studies","score":0.9800999760627747,"subfield":{"id":"https://openalex.org/subfields/1908","display_name":"Geophysics"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}},{"id":"https://openalex.org/T10572","display_name":"Geophysical and Geoelectrical Methods","score":0.9642000198364258,"subfield":{"id":"https://openalex.org/subfields/1908","display_name":"Geophysics"},"field":{"id":"https://openalex.org/fields/19","display_name":"Earth and Planetary Sciences"},"domain":{"id":"https://openalex.org/domains/3","display_name":"Physical Sciences"}}],"keywords":[{"id":"https://openalex.org/keywords/principal-component-analysis","display_name":"Principal component analysis","score":0.9042720794677734},{"id":"https://openalex.org/keywords/earths-magnetic-field","display_name":"Earth's magnetic field","score":0.7812927961349487},{"id":"https://openalex.org/keywords/seismology","display_name":"Seismology","score":0.5767266154289246},{"id":"https://openalex.org/keywords/eigenvalues-and-eigenvectors","display_name":"Eigenvalues and eigenvectors","score":0.5454666018486023},{"id":"https://openalex.org/keywords/geology","display_name":"Geology","score":0.483367383480072},{"id":"https://openalex.org/keywords/geodesy","display_name":"Geodesy","score":0.4700077176094055},{"id":"https://openalex.org/keywords/earthquake-prediction","display_name":"Earthquake prediction","score":0.44771966338157654},{"id":"https://openalex.org/keywords/variation","display_name":"Variation (astronomy)","score":0.43565884232521057},{"id":"https://openalex.org/keywords/meteorology","display_name":"Meteorology","score":0.3488963842391968},{"id":"https://openalex.org/keywords/statistics","display_name":"Statistics","score":0.27238237857818604},{"id":"https://openalex.org/keywords/mathematics","display_name":"Mathematics","score":0.2260667085647583},{"id":"https://openalex.org/keywords/geography","display_name":"Geography","score":0.18755841255187988},{"id":"https://openalex.org/keywords/physics","display_name":"Physics","score":0.14862850308418274},{"id":"https://openalex.org/keywords/astrophysics","display_name":"Astrophysics","score":0.07541587948799133},{"id":"https://openalex.org/keywords/magnetic-field","display_name":"Magnetic field","score":0.07114797830581665}],"concepts":[{"id":"https://openalex.org/C27438332","wikidata":"https://www.wikidata.org/wiki/Q2873","display_name":"Principal component analysis","level":2,"score":0.9042720794677734},{"id":"https://openalex.org/C199635899","wikidata":"https://www.wikidata.org/wiki/Q6500960","display_name":"Earth's magnetic field","level":3,"score":0.7812927961349487},{"id":"https://openalex.org/C165205528","wikidata":"https://www.wikidata.org/wiki/Q83371","display_name":"Seismology","level":1,"score":0.5767266154289246},{"id":"https://openalex.org/C158693339","wikidata":"https://www.wikidata.org/wiki/Q190524","display_name":"Eigenvalues and eigenvectors","level":2,"score":0.5454666018486023},{"id":"https://openalex.org/C127313418","wikidata":"https://www.wikidata.org/wiki/Q1069","display_name":"Geology","level":0,"score":0.483367383480072},{"id":"https://openalex.org/C13280743","wikidata":"https://www.wikidata.org/wiki/Q131089","display_name":"Geodesy","level":1,"score":0.4700077176094055},{"id":"https://openalex.org/C11097651","wikidata":"https://www.wikidata.org/wiki/Q606654","display_name":"Earthquake prediction","level":2,"score":0.44771966338157654},{"id":"https://openalex.org/C2778334786","wikidata":"https://www.wikidata.org/wiki/Q1586270","display_name":"Variation (astronomy)","level":2,"score":0.43565884232521057},{"id":"https://openalex.org/C153294291","wikidata":"https://www.wikidata.org/wiki/Q25261","display_name":"Meteorology","level":1,"score":0.3488963842391968},{"id":"https://openalex.org/C105795698","wikidata":"https://www.wikidata.org/wiki/Q12483","display_name":"Statistics","level":1,"score":0.27238237857818604},{"id":"https://openalex.org/C33923547","wikidata":"https://www.wikidata.org/wiki/Q395","display_name":"Mathematics","level":0,"score":0.2260667085647583},{"id":"https://openalex.org/C205649164","wikidata":"https://www.wikidata.org/wiki/Q1071","display_name":"Geography","level":0,"score":0.18755841255187988},{"id":"https://openalex.org/C121332964","wikidata":"https://www.wikidata.org/wiki/Q413","display_name":"Physics","level":0,"score":0.14862850308418274},{"id":"https://openalex.org/C44870925","wikidata":"https://www.wikidata.org/wiki/Q37547","display_name":"Astrophysics","level":1,"score":0.07541587948799133},{"id":"https://openalex.org/C115260700","wikidata":"https://www.wikidata.org/wiki/Q11408","display_name":"Magnetic field","level":2,"score":0.07114797830581665},{"id":"https://openalex.org/C62520636","wikidata":"https://www.wikidata.org/wiki/Q944","display_name":"Quantum mechanics","level":1,"score":0.0}],"mesh":[],"locations_count":3,"locations":[{"id":"doi:10.2481/dsj.iaga-20","is_oa":true,"landing_page_url":"https://doi.org/10.2481/dsj.iaga-20","pdf_url":"https://storage.googleapis.com/jnl-up-j-dsj-files/journals/1/articles/114/submission/proof/114-1-213-1-10-20150414.pdf","source":{"id":"https://openalex.org/S62969111","display_name":"Data Science Journal","issn_l":"1683-1470","issn":["1683-1470"],"is_oa":true,"is_in_doaj":true,"is_core":true,"host_organization":"https://openalex.org/P4310320511","host_organization_name":"Ubiquity Press","host_organization_lineage":["https://openalex.org/P4310320511"],"host_organization_lineage_names":["Ubiquity Press"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Data Science Journal","raw_type":"journal-article"},{"id":"pmh:oai:doaj.org/article:d8696683ccf8411c833a0e74b9aad5f3","is_oa":true,"landing_page_url":"https://doaj.org/article/d8696683ccf8411c833a0e74b9aad5f3","pdf_url":null,"source":{"id":"https://openalex.org/S4306401280","display_name":"DOAJ (DOAJ: Directory of Open Access Journals)","issn_l":null,"issn":null,"is_oa":false,"is_in_doaj":false,"is_core":false,"host_organization":null,"host_organization_name":null,"host_organization_lineage":[],"host_organization_lineage_names":[],"type":"repository"},"license":"cc-by-sa","license_id":"https://openalex.org/licenses/cc-by-sa","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Data Science Journal, Vol 10 (2011)","raw_type":"article"},{"id":"pmh:oai:ojs.datascience.codata.org:article/114","is_oa":true,"landing_page_url":"https://datascience.codata.org/jms/article/view/dsj.IAGA-20","pdf_url":null,"source":{"id":"https://openalex.org/S62969111","display_name":"Data Science Journal","issn_l":"1683-1470","issn":["1683-1470"],"is_oa":true,"is_in_doaj":true,"is_core":true,"host_organization":"https://openalex.org/P4310320511","host_organization_name":"Ubiquity Press","host_organization_lineage":["https://openalex.org/P4310320511"],"host_organization_lineage_names":["Ubiquity Press"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"submittedVersion","is_accepted":false,"is_published":false,"raw_source_name":"Data Science Journal; Vol 10 (2011); IAGA130-IAGA138","raw_type":"info:eu-repo/semantics/article"}],"best_oa_location":{"id":"doi:10.2481/dsj.iaga-20","is_oa":true,"landing_page_url":"https://doi.org/10.2481/dsj.iaga-20","pdf_url":"https://storage.googleapis.com/jnl-up-j-dsj-files/journals/1/articles/114/submission/proof/114-1-213-1-10-20150414.pdf","source":{"id":"https://openalex.org/S62969111","display_name":"Data Science Journal","issn_l":"1683-1470","issn":["1683-1470"],"is_oa":true,"is_in_doaj":true,"is_core":true,"host_organization":"https://openalex.org/P4310320511","host_organization_name":"Ubiquity Press","host_organization_lineage":["https://openalex.org/P4310320511"],"host_organization_lineage_names":["Ubiquity Press"],"type":"journal"},"license":"cc-by","license_id":"https://openalex.org/licenses/cc-by","version":"publishedVersion","is_accepted":true,"is_published":true,"raw_source_name":"Data Science Journal","raw_type":"journal-article"},"sustainable_development_goals":[],"awards":[],"funders":[{"id":"https://openalex.org/F4320326553","display_name":"China Earthquake Administration","ror":"https://ror.org/045sza929"}],"has_content":{"grobid_xml":true,"pdf":true},"content_urls":{"pdf":"https://content.openalex.org/works/W2024545955.pdf","grobid_xml":"https://content.openalex.org/works/W2024545955.grobid-xml"},"referenced_works_count":13,"referenced_works":["https://openalex.org/W262970172","https://openalex.org/W595429427","https://openalex.org/W1239166966","https://openalex.org/W1551376480","https://openalex.org/W1555148682","https://openalex.org/W1680224417","https://openalex.org/W2049876689","https://openalex.org/W2062249551","https://openalex.org/W2072635523","https://openalex.org/W2107098471","https://openalex.org/W2126061316","https://openalex.org/W2136841423","https://openalex.org/W2347683146"],"related_works":["https://openalex.org/W1972373683","https://openalex.org/W2000169474","https://openalex.org/W3113596969","https://openalex.org/W2167517487","https://openalex.org/W399120797","https://openalex.org/W2022035173","https://openalex.org/W2362142126","https://openalex.org/W1981000414","https://openalex.org/W2007682514","https://openalex.org/W2368958719"],"abstract_inverted_index":{"Principal":[0],"component":[1,9,32,84],"analysis":[2],"is":[3,46],"applied":[4],"to":[5,98,109],"analyze":[6],"the":[7,14,29,37,42,56,82,94,103,113],"horizontal":[8],"of":[10,81],"geomagnetic":[11],"data":[12],"for":[13,40],"Panzhihua":[15],"Ms":[16],"6.1":[17],"earthquake.":[18,104,114],"We":[19],"investigate":[20],"temporal":[21],"variations":[22],"in":[23],"eigenvalues":[24],"and":[25,58,71,75,96],"find":[26],"that":[27],"only":[28],"first":[30],"principal":[31,60],"has":[33],"good":[34],"correlation":[35,44],"with":[36,112],"Ap":[38],"index":[39],"which":[41,50],"cross-correlation":[43],"R":[45],"larger":[47],"than":[48],"0.6,":[49],"may":[51],"imply":[52],"solar-terrestrial":[53],"activity.":[54],"Both":[55],"second":[57],"third":[59,83],"components":[61],"show":[62],"clear":[63],"daily":[64],"variation,":[65],"being":[66],"high":[67],"during":[68],"work":[69],"hours":[70],"low":[72],"at":[73,85],"night":[74,86],"on":[76],"weekends.":[77],"The":[78],"mean":[79],"eigenvalue":[80],"(00:00-04:00":[87],"LT)":[88],"increased":[89],"about":[90],"40":[91],"days":[92,101],"before":[93,102],"earthquake":[95],"returned":[97],"normal":[99],"10":[100],"These":[105],"features":[106],"are":[107],"likely":[108],"be":[110],"correlated":[111]},"counts_by_year":[{"year":2026,"cited_by_count":1},{"year":2024,"cited_by_count":1},{"year":2021,"cited_by_count":2},{"year":2017,"cited_by_count":2}],"updated_date":"2025-11-06T03:46:38.306776","created_date":"2025-10-10T00:00:00"}